US Gallons to Cubic Yards
Convert us gallons to cubic yards instantly. 1 gal = 0.0049511317 yd³. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert us gallons to cubic yards
To convert us gallons to cubic yards, divide by 201.974025974 (multiply by 0.0049511317). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
yd³ = gal × 0.0049511317
US Gallons to Cubic Yards conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| US Gallons | Cubic Yards |
|---|---|
| 1 gal | 0.004951 yd³ |
| 2 gal | 0.009902 yd³ |
| 3 gal | 0.014853 yd³ |
| 5 gal | 0.024756 yd³ |
| 10 gal | 0.049511 yd³ |
| 20 gal | 0.099023 yd³ |
| 25 gal | 0.123778 yd³ |
| 50 gal | 0.247557 yd³ |
| 100 gal | 0.495113 yd³ |
| 500 gal | 2.475566 yd³ |
| 1,000 gal | 4.951132 yd³ |
What is a us gallon?
Exactly 231 cubic inches — smaller than the imperial gallon.
What is a cubic yard?
27 cubic feet. How concrete, mulch and gravel are sold in the US.
The formula
yd³ = gal × 0.0049511317
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the US Gallons to Cubic Yards
- Type the number of us gallons you want to convert.
- Read the result in cubic yards straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked cubic yards to us gallons page.
US Gallons to Cubic Yards — frequently asked questions
How many cubic yards are in a us gallon?
One us gallon equals 0.0049511317 yd³. yd³ = gal × 0.0049511317
What is the formula to convert us gallons to cubic yards?
The formula is yd³ = gal × 0.0049511317. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert cubic yards back to us gallons?
Divide instead of multiplying: one cubic yard is 201.974025974 gal. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this us gallons to cubic yards free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the us gallons to cubic yards.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error